check engine on 2002 Isuzu Trooper

what is code p-1870 no dtc?

Asked by for the 2002 Isuzu Trooper
1 answer
this is a transmission fault; here's some info:

Range switch malfunction could set a DTC P1870.

A mechanical failure of the shift solenoids, TCC solenoid, or TCC PWM solenoid could set a DTC P1870.

Internal transmission failures may set a DTC P1870.
An intermittent or incorrect engine speed signal may set a DTC P1870.


there are several tests a shop can run to identify the cause. definitely not a DIY repair.